The stochastic limit of quantum spin systems

Details The stochastic limit of quantum spin systems The stochastic limit of quantum spin systems

1999-11-17

arxiv.org/abs/quant-ph/9911077v1

Physics

Quantum Physics

11 pages, LaTeX 2.09

Scientific paper

10.1063/1.1291629

The stochastic limit for the system of spins interacting with a boson field is investigated. In the finite volume an application of the stochastic golden rule shows that in the limit the dynamics of a quantum system is described by a quantum white noise equation that after taking of normal order is equivalent to quantum stochastic differential equation (QSDE). For the quantum Langevin equation the dynamics is well defined and is a quantum flow on the infinite lattice system.

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